insect

(whiteflies in greenhouse)
I hear that white flies are a persistant problem in many, if not most,
greenhouses. One greenhouse keeper I knew said that leaving the
greenhouse open in good weather seemed to help control them. He also
sprayed on a regular basis. Don't know which insecticide he used.
Kelly Cassidy
Washington Cooperative Fish and Wildlife Research Unit
Mail Stop WH-10
University of Washington, Seattle